Sander or smoothing-machine.



No. 759,187. PATENTED MAY 3, 1904. G. H. OBER:

SANDER 0R SMOOTHING MACHINE.

APPLICATION FILED DEC. 13, 1901. no MODEL. e sums-sum: 1.

No. 759,187. PATENTED MAY 3, 1904. G. H. 0131311. SANDER 0R SMOOTHINGMACHINE.

APPLICATION FILED DEC. 13, 1901.

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No. 759,187. PATENTED MAY 3, 1904.

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SANDER 0R SMOOTHING MACHINE.

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No. 759,187. PATENTED MAY 3, 1904. G. H. OBER.

SANDER OR SMOOTHING- MACHINE.

APPLIOATIOH FILED DBO. 1a. 1001.

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PATENTED MAY 3,1904.

G. H. OBER. SANDER 0R SMOOTHING MACHINE.

APPLICATION FILED DEC. 13, 1901- B SHBBTSfifEET 6.

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Patented May 3, 1904.

PATENT OFFICE.

GEORGE H. OBER, OF OHAGRIN FALLS, OHIO.

SANDER OR SMOOTHlNG-MACHINE.

SPECIFICATION forming part of Letters Patent No. 759,187, dated May 3,,1904.,

Application filed December 18,1901. Serial No. 85,847. (No model.)

To (LZZ whom it may concern:

Be it known that I, GEORGE H. OBER, a citizen of the United States, anda resident of Chagrin Falls, in the county of Ouyahoga and State ofOhio, have invented a new and useful Improvement in Sanders orSmoothing-Machines, of which the following is a specification.

The nature of this invention relates to certain new andusefulimprovements in devices for sanding or smoothing turned woodenarticles by bringing them in contact with a rapidly-moving sand-belt.

The invention has for its object the construction of a machine for thepurpose named which'shall be automatic in its action and adjustable tothe reception of different widths of sand-belts.

To this end the invention consists in the peculiar construction ofrotating heads through which the article to be operated upon is fed androtated, in the adjustable mechanism for feeding the article throughsaid heads, in the means for bringing the face of the sand-belt incontact with the article, and in the peculiar construction, arrangement,and combina tions of the various parts, all as more fully hereinafterset forth, and pointed out in the claims.

In the accompanying drawings, which form apart of this specification,Figure 1, Sheet 1, is a side elevation of my improved machine. Fig. 2,Sheet 2, is a front end elevation. Fig. 3, Sheet 3, is a top plan. topplan with the rotating heads removed. Fig. 5, Sheet 5, is an enlargedside elevation of one of the rotating heads detached from the machine.Fig. 6, Sheet 5, is a top plan of Fig. 5. Fig. 7 Sheet 6, is a verticallongitudinal section on the line 3/ y of Fig. 6. Fig. 8, Sheet 6, is avertical cross-section on the line 00 m, Fig. 6. Fig. 9 is an enlargedelevation of the adjustable roll over which the sandbe1t travels.

A represents legs upon which are rigidly secured the bed-pieces B B,which support the operating mechanism, as hereinafter set forth. Thesebed-pieces are preferably of the form shown. A shaft 1 is journaled inproper transverse bearings across one end of the bed- Fig. l, Sheet 4,is a.

pieces, and a shaft 2 is journaled in similar beau ings in aslidingframe3. At the opposite end of the machine, 4 represents pulleys rigidlysecured upon corresponding ends of the shafts 1 and 2, and these pulleysare designed to carry a sanded belt 5, motion thereto being communicatedby means of a belt upon the pulley 6.

The frame 8 has a longitudinal sliding movement upon the bed-pieces B Bfor keeping the sand ed belt at the proper tension,the frame beingretained to position through the medium of the screw O.

D is a transverse bed-plate which is adjustably secured upon thebed-pieces B B by means of a bolt E, which passes down through saidplate, the underlying bed-piece B, and

the retainer-block F in such manner as will admit of said table beingadjustable to a slight angle with the line of travel of the sandbelt,said bed-plate D being secured to adjusted position by means of a boltand segmental slot. (Shown in dotted lines in Fig. 4.) The transversebed-plate may also be removed entirely from the machine in case it is.

desired to use the latter as an ordinary sander.

Hereinafter it will be seen that the machine is normally operated anautomatic sander;

but when some articles are being sanded it is impossible to use theautomatic feature, in which case it is only necessary to remove thetransverse bed-plate, when the machinecan be used for sanding saidarticles in a way that is common to the ordinary sanding-machine.

7 is a shaft which is journaled in proper bearings 8 on the bed-plate D,one end of said shaft carrying a pulley 9, over whichruns a belt 10 fromthe small pulley 11 upon the corresponding end of the shaft 1.

As the two revolving heads through which the article to be smoothedpasses are identical, one being located at each edge of thesanding-belt, I will describe but one head, using the same letters andfigures of reference upon Fig. l. This is to admit of an adjustment ofthe heads in the longitudinal direction of the bed-piece D. Journaled inproper hearings in the upper ends of the bracket 12 is a hollow head 14,which passes through a bevelgear 15, rigidly secured to the bracket 12and which meshes with similar but smaller gears 16 17, journaled uponthe stub-shafts 18 19, projecting from the hollow head 14. Thestub-shafts 18 19 carry the sprocketwheels 20 21, from which thesprocket-chains 22 23 impart motion to the sprocket-wheels 24 25 uponthe shafts 26 27, journaled in the free ends of the arms 28 29, theopposite ends of which latter are rigidly secured to the frames 30 31,through which the stub-shafts 18 19 pass. The free ends of the arms 2829 carry grooved wheels or feed-rolls 32 33 upon the stub-shafts 26 27,the peripheries of such rolls projecting through the slots 34 35,communicating with the bore of the head 14. The rolls 32 33 not onlyfeed the article being operated upon through the head 14, but alsocompel such article to rotate with the head. 36 37 are bolts tappedthrough the arms 28 29, the inner ends coming in contact with the faceof the head 14 and are for the purpose of adjusting the grooved rolls 3233. 38 39 are bolts projecting from the head 14, passing loosely throughthe arms 28 29, receiving upon their outer ends springs 40 41, which areretained in place by means of suitable washers and. nuts, as shown. Asprocketwheel 42 upon the projecting end of the rotatable head 14receives motion by means of a sprocket-chain 43 upon sprocket-wheel 44upon the corresponding end of the shaft 7, which latter receives motionby means of a belt 10, driven from the main shaft 1.

Fromthe above description it will be seen that when the sprocket-wheel42 is turned the arms 29 and also their feed-rollers will be re volvedabout the axis of the head 14 and that there will be a centrifugal forcetending to throw the rollers outwardly. This force will be resisted bythe springs 40 41. At times, however, this movement will set the articleoperated on to vibrating, and, as will be understood, the greater theamplitude of vibration the greater will be the tendency to vibrate, theresult being that it is very diflicult to turn out satisfactory work. Toprevent such vibrations, the set-screws 36 37 are employed, saidset-screws preventing the rollers from following up the work as it isthrown from the central axis of thehollow head 14.

45 is a rock-shaft properly journaled in the heads of the brackets 46,rising from the bedpieces B B, and upon this rock-shaft is secured aframe 47, which carries a roller 48 in close proximity to the inner faceof the sandbelt 5, as shown in Fig. 1.

49 is a lever upon the rod 50, which rod is provided with a cam 51,which may be turned by means of the lever 49, so as to come in contactwith an arm 52, projecting from the frame 47 as a means for raising theroller 48 into contact with the sand-belt and for bringing the latterinto contact with the article to be operated upon. By reference to Fig.1 it will be seen that this roller does not contact with the beltdirectly opposite said article, but at one side of the same, so that thebelt is bent around the latter. This arrangement of the roller resultsin giving an extended wearing or cutting surface and greatly increasesthe efficiency of the machine.

By the construction and arrangements of parts substantially as hereindescribed it will readily be seen that the various parts receive motionfrom the one shaft and travel in the same direction. The hollow headsrevolve at stationary points in the mechanism, but in the same directionas the travel of the sand-belt. Motion having been communicated to themachine, the article to be operated upon is fed into the hollow shaft14, which is upon the projecting end of the bed-plate D, until it isgrasped by the feed-rolls 32 33, which latter feed the article throughsaid head across the face of the rapidly-moving sand-belt and into thehollow head 14 upon the opposite edge of the belt, it being necessary tohave the two heads in order that the article may be operated uponthroughout its entire length.

In the drawings the revolving heads 14 are shown as adjustable to theiroutward limit that is, so as to permit of the employment of a wide beltfor operating upon long stock. I/Vhen short stock is to be operated uponand a narrow sand-belt employed, the heads may be readily adjustedtoward each other upon the bed-plate D, as hereinbefore described, andsuch bed-plate may, if desired, be turned slightly to an angle with theline of travel of the sand-belt for the purpose of making a shearinggrind across the face of the article being operated upon.

\Vhat I claim as my invention is 1. In a machine of the characterdescribed the combination of a traveling sand-belt, ro-

tatable heads journaled in bearings that are separately andindependently adjustable upon a transverse bed-plate, said bed-platehaving an adjustment annular to the line of travel of the sand-belt,substantially as and for the purpose specified.

2. In a machine of the character described, the combination of anabrading device, mechanism for simultaneously rotating andlongitudinally feeding an article past the abrading device, and meanswhereby the said mechanism may be adjusted so as to incline the articleto the direction of motion of the abrading device for the purposespecified.

3. In a machine of the character described, the combination ofbed-pieces, a shaft journaled in fixed bearings at one end of saidbedpieces, a second shaft journaled in adjustable bearings at theopposite end thereof, pulleys carried by said shafts and a sand-beltcarried by said pulleys, mechanism for simultaneously rotating andlongitudinally feeding an article past the abrading device, and meanswhereby the said mechanism may be adjusted so as to incline the articleto the direction of motion of the abrading device for the purposespecilied.

4E. In a machine of the character described, the combination of anabrading device, rotatable hollow heads journaled on opposite sides ofthe abrading device, arms carried by said heads and on the oppositesides thereof, feedrollers journaled in said arms, bolts projectingthrough the said arms and abutting the head to hold the arms outwardly,and a spring acting on the outer sides of the arms to press the sameinwardly, for the purpose specified.

5. In a machine of the character described, the combination of anabrading-belt, means for holding an article in position to be operatedupon by said belt, a roller for pressing the belt against the article, aframe in which said roller is journaled, a rock-shaft having a cam forlifting the frame and roller, and a handlever for rocking the shaft.

6. In a machine of the character described, the combination of anabrading-belt, means for holding an article in position to be operatedupon by said belt, a roller for pressing the tions between thebed-pieces and bed-plate, so

that the latter may be removed for the purpose specified.

8. In a device of the character described, the combination of theabrading device, of pivoted arms, opposing feed-rollers mounted in thefree ends of said arms, mechanism for imparting rotary and planetarymovement to the rollers, and means for regulating the extent of movementof said rollers toward each other, for the purpose specified.

eEo. H. onnn.

Witnesses:

HENRIETTA SPRAGUE, CHAS. M. W IGKS.

